Mysql is a relational database management system developed by the Swedish MySQL AB company and is a product of Oracle; the SQL language used by MySQL is the most commonly used standardized language for accessing databases.
#The operating environment of this article: Windows7 system, MySQL5.7, Dell G3.
mysql What does it mean?
MySQL is a relational database management system developed by the Swedish MySQL AB company and is a product of Oracle. MySQL is one of the most popular relational database management systems. In terms of WEB applications, MySQL is one of the best RDBMS (Relational Database Management System) application software.
MySQL is a relational database management system. A relational database stores data in different tables instead of placing all data in one large warehouse, which increases speed and flexibility.
The SQL language used by MySQL is the most commonly used standardized language for accessing databases. MySQL software adopts a dual licensing policy and is divided into community version and commercial version. Due to its small size, fast speed, low total cost of ownership, and especially the characteristics of open source, MySQL is generally chosen as the website database for the development of small and medium-sized websites.
System Features
1． MySQL is written in C and C and tested using a variety of compilers to ensure source code portability.
2. Supports AIX, FreeBSD, HP-UX, Linux, Mac OS, NovellNetware, OpenBSD, OS/2 Wrap, Solaris, Windows and other operating systems.
3． APIs are provided for multiple programming languages. These programming languages include C, C, Python, Java, Perl, PHP, Eiffel, Ruby, .NET and Tcl, etc.
4. Supports multi-threading and makes full use of CPU resources.
5. Optimized SQL query algorithm effectively improves query speed.
6. It can be used as a standalone application in a client-server network environment, or it can be embedded in other software as a library.
7． Multi-language support is provided. Common encodings such as Chinese GB 2312, BIG5, Japanese Shift_JIS, etc. can be used as data table names and data column names.
8. Provides multiple database connection channels such as TCP/IP, ODBC and JDBC.
9. Provides management tools for managing, checking, and optimizing database operations.
10. Supports large databases. Can handle large databases with tens of millions of records.
11. Supports multiple storage engines.
12.MySQL is open source, so you don’t need to pay extra.
13.MySQL uses the standard SQL data language form.
14.MySQL has good support for PHP, which is a popular web development language.
15.MySQL can be customized and adopts the GPL protocol. You can modify the source code to develop your own MySQL system.
16. Online DDL/change capabilities, data architecture supports dynamic applications and developer flexibility (new in 5.6)
17. Replicate global transaction identifiers to support self-healing clusters ( New in 5.6)
18. Copying crash-free slaves can improve availability (new in 5.6)
19. Copying multi-threaded slaves can improve performance (new in 5.6)
20.3 times faster performance (new in 5.7 [3])
21. New optimizer (new in 5.7)
22. Native JSON support (new in 5.7 )
23. Multi-source replication (new in 5.7)
24. Spatial expansion of GIS [4] (new in 5.7)
Recommended learning: " mysql video tutorial》
The above is the detailed content of mysql what does it mean. For more information, please follow other related articles on the PHP Chinese website!
What are the different storage engines available in MySQL?Apr 26, 2025 am 12:27 AMMySQLoffersvariousstorageengines,eachsuitedfordifferentusecases:1)InnoDBisidealforapplicationsneedingACIDcomplianceandhighconcurrency,supportingtransactionsandforeignkeys.2)MyISAMisbestforread-heavyworkloads,lackingtransactionsupport.3)Memoryengineis
What are some common security vulnerabilities in MySQL?Apr 26, 2025 am 12:27 AMCommon security vulnerabilities in MySQL include SQL injection, weak passwords, improper permission configuration, and unupdated software. 1. SQL injection can be prevented by using preprocessing statements. 2. Weak passwords can be avoided by forcibly using strong password strategies. 3. Improper permission configuration can be resolved through regular review and adjustment of user permissions. 4. Unupdated software can be patched by regularly checking and updating the MySQL version.
How can you identify slow queries in MySQL?Apr 26, 2025 am 12:15 AMIdentifying slow queries in MySQL can be achieved by enabling slow query logs and setting thresholds. 1. Enable slow query logs and set thresholds. 2. View and analyze slow query log files, and use tools such as mysqldumpslow or pt-query-digest for in-depth analysis. 3. Optimizing slow queries can be achieved through index optimization, query rewriting and avoiding the use of SELECT*.
How can you monitor MySQL server health and performance?Apr 26, 2025 am 12:15 AMTo monitor the health and performance of MySQL servers, you should pay attention to system health, performance metrics and query execution. 1) Monitor system health: Use top, htop or SHOWGLOBALSTATUS commands to view CPU, memory, disk I/O and network activities. 2) Track performance indicators: monitor key indicators such as query number per second, average query time and cache hit rate. 3) Ensure query execution optimization: Enable slow query logs, record and optimize queries whose execution time exceeds the set threshold.
Compare and contrast MySQL and MariaDB.Apr 26, 2025 am 12:08 AMThe main difference between MySQL and MariaDB is performance, functionality and license: 1. MySQL is developed by Oracle, and MariaDB is its fork. 2. MariaDB may perform better in high load environments. 3.MariaDB provides more storage engines and functions. 4.MySQL adopts a dual license, and MariaDB is completely open source. The existing infrastructure, performance requirements, functional requirements and license costs should be taken into account when choosing.
How does MySQL's licensing compare to other database systems?Apr 25, 2025 am 12:26 AMMySQL uses a GPL license. 1) The GPL license allows the free use, modification and distribution of MySQL, but the modified distribution must comply with GPL. 2) Commercial licenses can avoid public modifications and are suitable for commercial applications that require confidentiality.
When would you choose InnoDB over MyISAM, and vice versa?Apr 25, 2025 am 12:22 AMThe situations when choosing InnoDB instead of MyISAM include: 1) transaction support, 2) high concurrency environment, 3) high data consistency; conversely, the situation when choosing MyISAM includes: 1) mainly read operations, 2) no transaction support is required. InnoDB is suitable for applications that require high data consistency and transaction processing, such as e-commerce platforms, while MyISAM is suitable for read-intensive and transaction-free applications such as blog systems.
Explain the purpose of foreign keys in MySQL.Apr 25, 2025 am 12:17 AMIn MySQL, the function of foreign keys is to establish the relationship between tables and ensure the consistency and integrity of the data. Foreign keys maintain the effectiveness of data through reference integrity checks and cascading operations. Pay attention to performance optimization and avoid common errors when using them.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
WebStorm Mac version
Useful JavaScript development tools
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function
DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
SublimeText3 English version
Recommended: Win version, supports code prompts!
